A National Weather Service five-day outlook for Houston/Galveston, updated September 21, 2025, 5:16 AM. The outlook predicts near to slightly above normal temperatures, scattered showers and isolated thunderstorms, and continued chances of showers and storms through midweek. Maximum temperatures are expected to be in the upper 80s to mid-90s, and minimums in the upper 60s to mid-70s. The probability of precipitation is also included, with higher chances of rain around Galveston beaches.